Thanks for your question on Healthcare Magic.
I can understand your concern.
Metoprolol is good drug for PVCs and heart palpitations.
But better to rule out other heart diseases by doing
stress test and 2d echo.
Other possible cause for your symptoms is perimenopausal stress and anxiety.
You are approaching
menopause. So hormonal imbalance is likely at this age. And this can cause stress and anxiety.
Both of them can cause palpitations, sweating, breathing difficulty,
dizziness etc.
So better to consult gynecologist and get done hormone levels and if there is imbalance then start
hormone replacement therapy (HRT).
Avoid stress and tension, be relax and calm. You may need anxiolytic drugs too.
Don't worry, you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.